CVE-2017-20002
First published: Wed Mar 17 2021(Updated: )
The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM's nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Debian shadow | =4.4 | |
| Debian Debian Linux | =9.0 |
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Reference Links
Frequently Asked Questions
What is CVE-2017-20002?
CVE-2017-20002 is a vulnerability in the Debian shadow package that allows users to login as password-less users even if they are connected by non-physical means.
What is the severity of CVE-2017-20002?
The severity of CVE-2017-20002 is high with a severity value of 7.8.
How does CVE-2017-20002 affect Debian shadow?
CVE-2017-20002 affects the Debian shadow package by incorrectly listing pts/0 and pts/1 as physical terminals in /etc/securetty, allowing local users to login without a password.
How can I fix CVE-2017-20002?
To fix CVE-2017-20002, update the Debian shadow package to version 1:4.5-1 or later.
Where can I find more information about CVE-2017-20002?
You can find more information about CVE-2017-20002 at the following references: [link1], [link2], [link3].
- collector/nvd-index
- agent/severity
- agent/references
- agent/weakness
- agent/author
- agent/type
- vendor/debian
- canonical/debian shadow
- version/debian shadow/4.4
- canonical/debian debian linux
- version/debian debian linux/9.0